CCNA作业答案.doc

CCNA-Cisco-Chapter6 1 Refer to the exhibit. Which network prefix will work with the IP addressing scheme shown in the graphic. /24 /16 /20 /27 /25 /28 ??????? 2 Which IPv4 subnetted addresses represent valid host addresses? (Choose three.) 172.16.4.127 /26 172.16.4.155 /26 172.16.4.193 /26 172.16.4.95 /27 172.16.4.159 /27 172.16.4.207 /27 ??????????? 3 Which statements are true regarding IP addressing? (Choose two.) NAT translates public addresses to private addresses destined for the Internet. Only one company is allowed to use a specific private network address space. Private addresses are blocked from public Internet by router. Network 172.32.0.0 is part of the private address space. IP address 127.0.0.1 can be used for a host to direct traffic to itself. ?????? 4 Which process do routers use to determine the subnet network address based upon a given IP address and subnet mask? binary adding hexadecimal anding binary division binary multiplication binary ANDing ???????? 5 What is the network address of the host 172.25.67.99 /23 in binary?0100001101000011010000100100001001000011.00000000 ???????? 6 What subnet mask would a network administrator assign to a network address of 172.30.1.0 if it were possible to have up to 254 hosts? 255.255.0.0 255.255.255.0 255.255.254.0 255.255.248.0 ??????? 7 Which three IP addresses are private? (Choose three.) 172.168.33.1 10.35.66.70 192.168.99.5 172.18.88.90 192.33.55.89 172.35.16.5 ???????? 8 Given the IP address and subnet mask of 172.16.134.64 255.255.255.224, which of the following would describe this address? This is a useable host address. This is a broadcast address. This is a network address. This is not a valid address. ????????? 9 Refer to the exhibit. Host A is connected to the LAN, but it can